Background: School children are at great risk of nutrition-related chronic diseases. Their eating pattern in
school is influenced by the availability of food served within the school environment. The purpose of this
paper was to determine the effectiveness of a canteen-based food nutrition intervention, designed according
to the theory of planned behaviour, on the knowledge, perception and choices of healthy food among primary
schoolchildren.
Methods: This was a prospective intervention study using a two-group design. Six school canteens from the
ninety-eight primary schools were randomly allocated to an intervention group or a control group. All the
food handlers in the intervention group were given a twelve-week training course in food nutrition. On the
completion of the course, 293 Standard Six students from these schools, were interviewed with a nutritional
questionnaire on food in their school canteens. The training programme for the intervention group and the
questionnaire for the students were developed and validated for the study, and a power calculation made for
the sample size of students.
Results: The students in both groups were homogeneous in gender and body mass. The mean body mass
index (BMI) was 19.26 (SD: 0.38) and 19.47 (SD: 0.39) for the intervention and the control group respectively.
There were more schoolchildren in the intervention group who purchased foods in school canteens (p 0.0036)
of milk and milk products (p 0.034), and white rice (p